/// <summary>
/// Paint the node text
/// </summary>
/// <param name="oNode"></param>
/// <param name="oGraphics"></param>
/// <param name="nX"></param>
/// <param name="nY"></param>
private void PaintNodeText(Node oNode, Graphics oGraphics, int nX, int nY,
ref Hashtable m_mapRectToItemCheck, ref Hashtable m_mapItemCheckToRect)
{
int nAlpha = oNode.TreeView.GetNodeAlpha(oNode);
Font oFont = oNode.GetFont();
if (oNode.Flash == true)
nAlpha = 255;
//if (oNode.GetShowPlusMinus() == false)
// nX -= 15;
SizeF oTextSize = oGraphics.MeasureString(oNode.GetText(), oNode.GetFont(), oNode.GetTreeView().GetDrawWidth() - nX - 8);
if (m_oTreeView.Multiline == false)
oTextSize = oGraphics.MeasureString(oNode.GetText(), oFont);
oNode.Top = nY + (int)oTextSize.Height + 2;
int nTextWidth = (int)oTextSize.Width;
oNode.TextWidth = nTextWidth;
if (oTextSize.Height == 0)
{
oTextSize.Height = oNode.GetFont().Height;
}
// draw check boxes
if (oNode.GetCheckBoxes() == true && oNode.CheckBoxVisible == true)
{
Pen oPen = null;
if (oNode.Flash == true)
nAlpha = 255;
#region draw check background
if (oNode.GetCheckBackColor() != Color.Transparent)
{
if (oNode.Parent == null || oNode.Parent.SubNodesCheckExclusive == false)
{
Rectangle rectCheckBack = new Rectangle(nX + 4, nY + 2, 11, 11);
Color backColor = Color.FromArgb(nAlpha, oNode.GetCheckBackColor());
Brush brush = new SolidBrush(backColor);
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.XP)
{
Color fadeColor = oNode.GetCheckBackColor();
if (fadeColor == Color.White)
fadeColor = Color.LightGray;
brush = new LinearGradientBrush
(
rectCheckBack,
Color.FromArgb(nAlpha == 255 ? 255 : 48, fadeColor),
Color.White,
LinearGradientMode.ForwardDiagonal
);
}
oGraphics.FillRectangle(brush, rectCheckBack);
brush.Dispose();
brush = null;
}
else
{
Rectangle rectCheckBack = new Rectangle(nX + 4, nY + 2, 11, 11);
Color backColor = Color.FromArgb(nAlpha, oNode.GetCheckBackColor());
Brush brush = new SolidBrush(backColor);
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.XP)
{
Color fadeColor = oNode.GetCheckBackColor();
if (fadeColor == Color.White)
fadeColor = Color.LightGray;
brush = new LinearGradientBrush
(
rectCheckBack,
Color.FromArgb(nAlpha == 255 ? 255 : 48, fadeColor),
Color.White,
LinearGradientMode.ForwardDiagonal
);
}
GraphicsPath path = new GraphicsPath();
path.AddEllipse(nX + 4, nY + 2, 10, 10);
Region region = new Region(path);
oGraphics.Clip = region;
oGraphics.FillRectangle(brush, rectCheckBack);
oGraphics.Clip = new Region(new Rectangle(0, 0, m_oTreeView.Width, m_oTreeView.Height));
brush.Dispose();
brush = null;
}
}
#endregion
oPen = new Pen(Color.FromArgb(nAlpha, oNode.GetCheckBorderColor()), 1);
Rectangle rectCheck = new Rectangle(nX + 3, nY + 1, 12, 12);
#region draw check rectangle
if (oNode.Parent == null || oNode.Parent.SubNodesCheckExclusive == false)
{
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.Solid || oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.XP)
oGraphics.DrawRectangle(oPen, rectCheck);
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.Dot)
{
oPen.DashStyle = DashStyle.Dot;
oGraphics.DrawRectangle(oPen, rectCheck);
}
}
else
{
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.Dot)
oPen.DashStyle = DashStyle.Dot;
if (oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.Solid || oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.XP
|| oNode.GetCheckBorderStyle() == CheckBoxBorderStyle.Dot)
oGraphics.DrawEllipse(oPen, nX + 4, nY + 2, 10, 10);
}
oPen.DashStyle = DashStyle.Solid;
#endregion
m_mapItemCheckToRect.Add(oNode, rectCheck);
m_mapRectToItemCheck.Add(rectCheck, oNode);
if (oNode.Checked == true)
{
if (oNode.Parent == null || oNode.Parent.SubNodesCheckExclusive == false)
{
oPen.Color = Color.FromArgb(nAlpha, oNode.GetCheckCheckColor());
oGraphics.DrawLine(oPen, nX + 6, nY + 6, nX + 6, nY + 8);
oGraphics.DrawLine(oPen, nX + 7, nY + 7, nX + 7, nY + 9);
oGraphics.DrawLine(oPen, nX + 8, nY + 8, nX + 8, nY + 10);
oGraphics.DrawLine(oPen, nX + 9, nY + 7, nX + 9, nY + 9);
oGraphics.DrawLine(oPen, nX + 10, nY + 6, nX + 10, nY + 8);
oGraphics.DrawLine(oPen, nX + 11, nY + 5, nX + 11, nY + 7);
oGraphics.DrawLine(oPen, nX + 12, nY + 4, nX + 12, nY + 6);
}
else
{
oPen.Color = Color.FromArgb(nAlpha, oNode.GetCheckCheckColor());
oGraphics.DrawEllipse(oPen, nX + 6, nY + 4, 6, 6);
oGraphics.DrawEllipse(oPen, nX + 7, nY + 5, 4, 4);
oGraphics.DrawEllipse(oPen, nX + 8, nY + 6, 2, 2);
oGraphics.DrawEllipse(oPen, nX + 9, nY + 7, 1, 1);
oGraphics.DrawRectangle(oPen, nX + 8, nY + 6, 2, 2);
}
}
oPen.Dispose();
nX += 17;
}
// paint the picture first if needed then draw the text
if (oNode.Image != null)
{
oGraphics.DrawImage(oNode.Image,
nX + 4,
nY + (int)(oTextSize.Height / 2.0) - (int)((float)oNode.Image.Height / 2.0) + 1,
oNode.Image.Width, oNode.Image.Height);
nX += oNode.Image.Width + 2;
}
else
{
if (oNode.ImageIndex != -1 && oNode.TreeView.ImageList != null
&& oNode.ImageIndex < oNode.TreeView.ImageList.Images.Count)
{
oNode.TreeView.ImageList.Draw(oGraphics, nX + 2,
nY + (int)(oTextSize.Height / 2.0) - (int)((float)oNode.TreeView.ImageList.ImageSize.Height / 2.0),
oNode.TreeView.ImageList.ImageSize.Width,
oNode.TreeView.ImageList.ImageSize.Height,
oNode.ImageIndex);
nX += oNode.TreeView.ImageList.ImageSize.Width;
}
}
// get the right side of the text. if it is more far away than the width of the TreeView, truncate the text
string sText = oNode.GetText();
// render the text
SolidBrush oTextBrush = new SolidBrush(Color.FromArgb(nAlpha, oNode.GetForeColor()));
// when draging the mouse over nodes, test if the node is being highlighted
if (oNode == oNode.TreeView.HighlightedNode)
oTextBrush.Color = oNode.GetHighlightedForeColor();
Rectangle textRect = new Rectangle(nX + 2, nY, oNode.GetTreeView().GetDrawWidth() - nX - 15,
(int)oNode.GetTreeView().Height);
SizeF textSize = oGraphics.MeasureString(StringDrawUtils.GetInstance().GetTextFromFormattedString(sText), oFont,
oNode.GetTreeView().GetDrawWidth() - nX - 15);
// clear the truncated flag
oNode.TextTruncated = false;
if (m_oTreeView.Multiline)
{
if (oNode.UseFormatting == true)
{
CharacterFormat chrFormat = new CharacterFormat(
oFont,
oTextBrush,
0,
HotkeyPrefix.None,
true);
ParagraphFormat paraFormat = new ParagraphFormat(
ParagraphAlignment.Left,
ParagraphVerticalAlignment.Top,
true,
true,
StringTrimming.None,
Brushes.Transparent);
StringDrawUtils.GetInstance().DrawStringInRectangle(oGraphics, sText, textRect,
chrFormat, paraFormat);
}
else
oGraphics.DrawString(sText, oFont, oTextBrush, textRect);
}
else
{
sText = oNode.GetText();
oTextSize = oGraphics.MeasureString(StringDrawUtils.GetInstance().GetTextFromFormattedString(sText), oFont);
nTextWidth = (int)oTextSize.Width;
if (nX + 2 + nTextWidth > m_oTreeView.m_LastNX)
m_oTreeView.m_LastNX = nX + 2 + nTextWidth;
if (nX + nTextWidth > oNode.GetTreeView().GetDrawWidth() - 15)
{
sText = StringDrawUtils.GetInstance().GetTextFromFormattedString(sText);
float fChar = oTextSize.Width / float.Parse(sText.Length.ToString());
int nChar = (int)((float)(nX + nTextWidth - oNode.GetTreeView().GetDrawWidth() + 15) / fChar) + 4;
if (nChar < 0)
nChar = 0;
int nLength = sText.Length - nChar;
if (nLength < 0)
nLength = 0;
sText = sText.Substring(0, nLength) + "...";
oNode.TextTruncated = true;
}
// draw string (text) of the node in the proper system, based on the information whether it has formatting or not
if (oNode.UseFormatting == true)
{
CharacterFormat chrFormat = new CharacterFormat(
oFont,
oTextBrush,
0,
HotkeyPrefix.None,
true);
StringDrawUtils.GetInstance().DrawString(oGraphics, sText, new PointF(nX + 2, nY),
chrFormat, ParagraphAlignment.Left);
}
else
oGraphics.DrawString(sText, oFont, oTextBrush, nX + 2, nY);
}
if (m_oTreeView.Multiline == false)
textSize = oGraphics.MeasureString(StringDrawUtils.GetInstance().GetTextFromFormattedString(sText), oFont);
oTextBrush.Dispose();
// create the expand icon if specified
if (oNode.GetShowSubitemsIndicator() == true && oNode.Nodes.Count > 0 && oNode.IsExpanded == false)
{
int nIconX = (int)textRect.Left + (int)textSize.Width + 4;
Pen oIndicatorPen = new Pen(Color.FromArgb(nAlpha, oNode.GetForeColor()), 1);
oGraphics.DrawLine(oIndicatorPen, nIconX, nY + textSize.Height - 4, nIconX + 3, nY + textSize.Height - 4);
oGraphics.DrawLine(oIndicatorPen, nIconX + 1, nY + textSize.Height - 5, nIconX + 3, nY + textSize.Height - 5);
oGraphics.DrawLine(oIndicatorPen, nIconX + 2, nY + textSize.Height - 6, nIconX + 3, nY + textSize.Height - 6);
oGraphics.DrawLine(oIndicatorPen, nIconX + 3, nY + textSize.Height - 6, nIconX + 3, nY + textSize.Height - 7);
oIndicatorPen.Dispose();
}
if (oNode.Underline == true)
PaintNodeUnderline(oNode, sText, oGraphics, nX, nY);
}